Container end closure



July 15, 1952 .1. A. HOLLINS HEAD CONTAINER END CLOSURE Filed Oct. 4,1948 Jame a affmdfima 7 I N V E N T'O R Patented July 1952 H 2,603,400CONTAINER. END CLOSURE James A. Hollinshead, Monroe, Mich., assignor toConsolidated Paper Company, Monroe, Mich a corporationof MichiganApplication October 4, 1948, Serial No. 52,651

2 Claims. (01. 229-45) This invention relates to self-locking ends orclosures for tubular containers, especially wherein the tubular wall mayrespond to some radial pressure in yielding slightly.

This invention has utility when incorporated in fiberboard, cardboardand paperboard types of containers in general polygonal or approachingcylindrical form with relatively inwardly foldable end wall portions,preferably of slightly over normal radial extent for snapping into anapproximate transverse plane to provide a full endclosure. When thisset-up is taken as of hexagon general form, symmetrical triangularscored portions are continuous with bases toward the tubular body ofthecontainer. A pair of relatively foldable lobes or sections is betweenthe remote apices of thetriang'les. Upon collapsing of the end extensiontriangles toward the closure plane, the intermediate lobes are inwardtherefrom to leave the group of the triangles as the sole and completeend exposure for the container.

Referring to the drawings:

Fig. 1 is a perspective view looking at a closed end of a drum type oftubular container having an embodiment of the invention incorporatedtherewith and in closed position for an end thereof;

Fig. 2 is a fragmentary view thru .theself sealed end closure or top ofthe container of Fig. 1;

Fig. 3 is a partial side elevation of the empty collapsed unfilled drumof Fig. 1, showing the end age stages in charging" a container, aswithhot' asphalt, with which there may. be lob-embedding in promotingcontainer'end sealing and reinforcement.

For asphalt drums ln'the'rangeof 1 00a capacity,"

fiberboard sheets may be blanked out, say for about 22" body'length and,withjthe similar'tri- Y angle extensions wherein theperpendicularlength of the triangles approximate 6 for a drum having its cylinderdiameterabb'ut 13%,". The blank in its collapsed form, as for shippingto destination to be filled, has a flat'body side I,

with parallel fold line scores 2, 3, for body side portions 4, 5,'havingan overlap 'for'a stapling or seam stitching 6, parallel to the scorelines 2, 3.

'The drum or container body'extendsto'anendless peripheral or outwardscore line I, normally transverse or perpendicular to the stitching 6and the score lines 2, 3. Additional, also outare convergingscore lines8, 9, in pairs in the end closure extension from the drum body, definingthe several triangles II) in base continuity on the scoring 1. At thestitching 6, there is from the body portion 4 a fractional triangleextension portion II with a cut back side I2 from a tip I3 at theconverging of the lines 8, 9, so that the portion II side I2 does notoverhang'the score line 9 of fractional triangle portion I4 from theside 5. Also adjacent the seam or stitching 6 of the overlap, theportion I4 has a cut back side I5 from the region of the tip I3 in suchproximity that the portion i4 does not overhang the score line 8. Thisinsures that the sheet stock in its folding at the score lines is-onlysingle ply.

At the converging tips I3 for the some lines 8, 9, of the respectivetriangles I0 remote from the base sides I, are lobe end or tip portionsI6 of about 60 away from a perpendicular I! to the base I. This makesthe portions I6 as fully tion'I8 of the score lines 9, 8, of thethereadjoining triangles I0, an inside not-penetrating cutting I9provides a fold-defining direction to the junction I8 from an archedinward scoring line 20 extending perpendicular to the line I and therebybisecting the region between triangle apices I3. There may be arcportions 2| from the out-limit of the line 20 connecting a portion I6each way from the line 20, thereby completing'the lobe pair 22, 23,complementary to and reversely pointed as to the line I from thetrlangles ID. The scoring 20, i9, is efiective'in determining each lobe22, 23, to have its point at the junction I8. In the tubular set-up ofthe container body, following such with directing the triangles III tohave their apices i3 converge, the lobes 22, 23, tend to have advanceinward fold to leave exposed only the triangles I0.

The container charging or filling operation may be for a freely flowingbulk material. In

the event-such be a hot liquid-as asphalt, tend-v ing upon cooling toshrink in its transition to a. frangible solid state thru a rubbery orsyrupy stage, there is a volume total lessening. I For in stance, as thecollapsible end extension is peripherally continuous, flow charging maybe outlett therewith the contents; sayof cooling as:

metrgical thrusting but accompanying radialre 1 lines ward beyond thescore line I, say to a region 24 (Fig. Initial cooling shrinkage maydevelop a central'less height region 25, with a marginal less-settlingmore or less heavy rim portion 26. A later stage may be toward a nearlyfully settled region 21. While the substance be not set to resist thefirm cutting thrust of lobe pair 22, 23, at inwardlygextending'closefold; at the; score 19, 20, definite stiff edge 28 may be=moved intoem.- bedding coaction 29 (Fig. 2). While this performance may be carriedon with powder or more less coarse granular material, when with adhesivev property product such as asphalt, there isa supplemental sealing 39 atthe 1obe,fo1d-:end !6 ,@2l,-. by the thermo plastic material;

Under the practice herein, while the end closure may be for the bottomof a tubular container.. such may have the lobe infolds toradiating ribs28 as inwardly projecting to converge. spaced. from the apices [3.Whether or not such be left asiinwardly extending fins as majordiametrical reinforcementpr be flattenedoutto beagains'ti theinnensidesofathetriangles ifl there is a non: scoreregiqn of the -.-lobetips .16, 2 l which, may carr ,an adhesive 3|. There istherebydeyeloped.a tight; sealing in the handling of powderor gram ular. material;whichmay not have the: transition a stage of-.-seal-ing as discussed forasphalt.

The snap locking .ior automatically holding thezendg closure iseffected: by havingcylinder 32.. (Fig; l). of .a diameter -33,'whichunder the 13 dimension hereinbefore .takenas an example, maybeiyvith-the;score-line sidest, S -of the triangles; in rthe range of7". From; this itfollows, as the-.apices; I 3 are thrust inward tohavethe triangles; 1 0 move. toward a common, plane therefor;

. the: somewhat,- longer. or hypotenuse; distances at theiperpendicularportions; I 6 snugly. ride againsteach-other increating-slight bulgecorners, 3G in developing the hexagon type of the regular poly--gon..;end, closure; Because this final closing op.-' erationis-desirably not taken after- .rigid {setting q of;the-contents,=-butprior thereto Whenthere isI some 5 dimension accommodationcharacteristics phalt,- has its syrupyflowdnfirmly to :fill the-corners;34 asiradially reintorced,by thelobe ribs 28.

As the down thrustingpfthe. points or .apices i3' J ofthesix triangleslDis to an. extent for the abi1t= ting thrustingsbetweenthe lobe end armportions 2 I .to: -ride; to,-the straight, portions J I 6,- there. iis'jshorter; radius approach to the, lines 8, 9, audit-here is {thus i asort. of; toggle ,quickj lodging of i the, tr angles in. afcom-monplane.Even rough handling tending crumble haird'nedasphalt' in the end;- atoneend-ofsaid sidesaid closure portion hav"-- corners has siftingtloeretrom almost-totally eli'm inat ed .F om the.--foregoing;;it is; tobelnoted that reinbqdiment .-with special advantages. ensue when.

theltrianglesglll fo'rthej series totalgeven, sorthat gq V 7 g Y 7 ther;defined bypairsgof onve 'sineiioidTunes j there may. begalignmentbetween score lines-8 9 of adjoiningtriangles and the score lines,9,theadjoining diametricalppposite pair of tr a glesgl l1: There is thus;achieved not only the d1.

iniorcement ion the approximately flat; end, some instancea theinwardthrust of the apices l3.may. ;be;to such an extentas, to -leave the en ddished myvardslig htly jlfhis; maypccur when the hru tisemi ent xv eerns takerup .a pr xie rm 7 atelyl a11, .orat;,. east qraiot j n R e nhelfl t hr s be d seenl m a melock appr x mate .r anar. ositi n-i he ft- 9 .form a zigzag end-1esacdurse from ,th,

.. S e 1w;

fold linesriextending atright angles to said pe--- ,saidbaselinegextendins from .a'dj',acent baseang' of said, tr angles to saidrecess between said pair ,tmglg section'swithlsaid.r g t.

closure extension from the scoring connection 7. The lobe pairs 22, 23comprise a second annular or endless series interfitting with thetriangle endless series If]. At, the closure, the lobe pairs 22, 23 bondas a two-ply radially extending rib. In the adoption of symmetricalpolygon form, the respective triangles are isosceles, or have the scoresides$8, 9 of equal length, r r

The completed and 'filleddrum or container is reliable, may be stacked,sidewise or on end, and either end up. In adopting such general roughhandling, there should be suflicient adhesion action between thecontents and the container closure-and body or the inccrporatlon of thead- ..hesivew3l... Accordingly here there is primarily a singleservice-container which may be stored and shipped.fiat,,.whileresponsive to tubular set-up with integral self-locking and self-sealingradially reinforced end closure or end closures.

The isosceles triangles it in their blank extend ondthen ind icalt u arhy.A. 5 havethe llIlflSjQIySldBSgBg-Q in the .range.rofr8% longer than.the;true radius for the ,drum, in thereby promoting the outward thrustfor the corners 3% andthe medial toggle. 1 l

What; i s claimed and itr'is desired to secure. by v LettersPatent is r1 1. Anopenended fiberboard drum and closure formed-thereby :byfoldinginwardly a portion of L the .container wall adjacent saidopening, said portion being defined by a peripheral fold linef thesupperedge of said drumdefining said open--- ingbeing scalloped to form aseriesof lobes, said portion includinghpairs ofconvergingly -inclined--fold lines extendlng from' said peripheral fold line andlsaidinclinedpairs of fold lines intersecting at:points on said: scallopededgebetween adjacent pairs of adjacent lobesot said scallops, other foldlines alternating with said inclinedpairs of ripheral fold lineand-terminating'at points'between said pairsof scallops, the--linesforming the:-edges OfjSaid'SCa'HO pS extending from the point ofintersectionof'said inclined fold lines being straight lines: atrightanglesto adjacent "that portion forming the straight line of saiding' ascal-loped oute redge and being separated It from'said-sidesby a foldlinewhich also form s T the base line of a plurality of acliacentisosceles iansleis t o s idtri r sle.sectio s bein runthe1,;outeriedgesiof; sa'id lobes. connecting said j pice lcomprisinsleh esatr eht ansls to a jacent.ccnver in ra d.lines anq then wivci'j pa..r;.. hi add i na ;'fold'lih s" atr ght. angles 1:

of lobejs ofgsaid scalloped edge, whereby said clo' 1 0.11 .formsatfthe, end. of a dylind conta -..a hat. closed end made up .of;.said

5 lobes abutting each other axially of said con- Number tainer. 12,053,298 JAMES A. HOLLINSHEAD. 2,224,504 2,365,704 REFERENCES CITED 52,393,987

The following references are of record in the file of this patent:

' Number UNITED STATES PATENTS 206,764 Number Name Date 10 505,526

534,645 Knobeloch Oct. 10, 1899 Name Date Reed Sept. 8, 1936 Milmoe Dec.10, 1940 James Dec. 26, 1944 Harmon Feb. 5, 1946 FOREIGN PATENTS CountryDate Great Britain Nov. 15, 1923 Great Britain May 12, 1939

